Gibbons v. Ogden -- interstate commerce
Answer: The prospective approach.
Explanation: The prospective approach in a study looks out for product or result of the study. In this approach, a research/study is concluded based on the outcome. For example in the development of a drug, the study will involve testing different methods and concluding based on outcomes.
Chemical water/air affect human body health function.
Short-term exposure to some chemical pollutants can impair the immune, endocrine and reproductive systems. pollution may reason lesions, alter liver function or darken the skin. Chemical pollution may trigger asthma symptoms in those diagnosed with the disease. Exposure to excessive stages of air pollutants can purpose a spread of adverse health results. It increases the threat of breathing infections, heart ailment and lung cancer. both short and long term exposure to air pollution have been related to fitness impacts. More intense impacts affect people who are already unwell.
If drinking water carries dangerous levels of contaminants, it may motive fitness effects, along with gastrointestinal ailments, nervous system or reproductive outcomes, and continual sicknesses which include cancer. Many other materials may also be absorbed through the pores and skin in big quantities. These consist of mercury, isocyanates, polychlorinated biphenyls (PCBs), acrylates, and pharmaceutical products together with steroids and nicotine.
Learn more about chemical pollution here:-
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Answer:
Lighting significantly affects performance
Explanation:
In this study, Ellen took two groups and applied the same IQ test to both of them. The only variable that changed between the groups was the level of lighting in the room. The first group was placed in a room with very bright lights and the second group was placed in a room with more normal lighting.
Individuals in the first group did better in the IQ test and she found that the difference between the two scores was statistically significant.
We say that a result is <u>"statistically significant" when it is not likely to occur randomly but rather is likely to be attributable to a specific cause.</u>
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So we can say that <u>the better performance in the first group tests were not likely to occur randomly but it can be attributable to a specific cause. </u>
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<u>Since the only variable that was different between the groups was the lightning, we can conclude that lighting significantly affects performance. </u>
